This instrument was at home in the Valvo Manufacturing for Capacitors in Herborn, DE , in the QC laboratory.

greetingsMartin

Thanks for the nice pictures! I now remember I've seen it before on your site. They did use their parts efficiently those days, the power transformer originated in the consumer electronics department was also used in some radio sets

You probably know already, but ICOMA was the components branch of Philips and EBM the internal instrument and machine manufacturing departments.

"The mind is a funny thing. Sometimes it needs a good whack on the side of the head to jar things loose."

I have an old Keithley, there is the last nixie out of time, so i made there a smaller resistor to enhance the voltage, this was enough, it works again. A rare nixie, hard to find.amazing oldie 160 knows nA and G-Ohm

That's a beautiful device Elcom was at that time everyone far ahead HP etc name them.I use the Elcom still the directional couples are still the best 75 Ohm specially developed for cable television.The Elcom at the time costs with two directional couplers 85.000, - Dm.Every large company in Germany which manufactured components did have a few.The Elcom which I have comes from Siemens.

I have two sets of directional couplers 50 Ohm just like you with N-conectors but also the 75 Ohm with 3.5 / 12 connectors.I also have the two manuals and various graticules Smith Chart and others.If you are going to work on the device and if you have questions no problem.

That computer printer on the folder underneath your analyzer is a Commodore 4000-series PET. Commodore PET machines used a standard IEEE-488 (GPIB or otherwise known as HP IB) interface to connect peripherals and that is most likely the reason that particular line of hardware was chosen as a controller for your analyzer. CBM PET machines used a CBM 4040 or earlier 4030 dual 5¼" floppy drive (SDSS - single density single sided) also controlled via the IEEE-488 bus. If memory serves me well, PET formatted discs are also readable by 1540 drives connected to a C64 or VIC-20.

I forget to answer your second question but @Hewlett has already explained it.At the beginning of this year I have removed the PET computer too big you can not do anything with it.But as @Hewlett already indicates at that time a well-known between solution also Rohde & Schwarz made use of this.I work with the Elcom on the usual IEC628 bus.But that is for later.

we go every year to the makerfaire hannover,my "Wellenkino" with classic test gears, always beside the PTB metrology institute, they offer free calibrating for multimeters there. So we are smiling, from left side to right side is +-5% to +- 0 2016, 2017, 2018.. next date is august, 17, 2019